Thermal power MCQs, January 8, 2026July 12, 2024 by u930973931_answers 25 min Score: 0 Attempted: 0/25 Subscribe 1. What is the primary fuel used in most thermal power plants? (A) Coal (B) Natural Gas (C) Nuclear Fuel (D) Solar Energy 2. Which component is used to convert heat energy into mechanical energy in a thermal power plant? (A) Boiler (B) Turbine (C) Condenser (D) Generator 3. The efficiency of a thermal power plant is typically in the range of: (A) 50–60% (B) 15–25% (C) 30–45% (D) 5–10% 4. Which of the following is not a type of thermal power plant? (A) Combined Cycle (B) Hydroelectric (C) Geothermal (D) Biomass 5. The Rankine cycle is used in thermal power plants for: (A) Refrigeration (B) Steam power generation (C) Solar energy conversion (D) Battery charging 6. In a thermal power plant, which device increases the temperature of feedwater using waste heat? (A) Superheater (B) Economizer (C) Boiler (D) Deaerator 7. Which pollutant is a major concern associated with coal combustion in thermal power plants? (A) Sulfur dioxide (SO₂) (B) Carbon monoxide (CO) (C) Nitrogen oxides (NOₓ) (D) Particulate matter (PM) 8. The primary purpose of a condenser in a thermal power plant is to: (A) Increase steam pressure (B) Control cooling water flow (C) Increase turbine efficiency (D) Reduce steam temperature 9. Which fuel has high calorific value and low sulfur content, making it suitable for thermal power plants? (A) Natural Gas (B) Peat (C) Lignite (D) Anthracite 10. Which type of turbine is commonly used in modern thermal power plants due to higher efficiency? (A) Impulse turbine (B) Pelton turbine (C) Reaction turbine (D) Kaplan turbine 11. The term “CHP” stands for: (A) Coal Handling Plant (B) Combined Heat and Power (C) Condenser Heat Pump (D) Controlled Heat Production 12. Reheating of steam in a thermal power plant is primarily done to: (A) Remove steam impurities (B) Decrease condenser pressure (C) Increase turbine efficiency (D) Reduce blade temperature 13. Which is a disadvantage of nuclear thermal power plants compared to fossil-fuel plants? (A) Higher operating costs (B) Limited fuel availability (C) Lower environmental impact (D) Easier waste disposal 14. Which component controls the generation of electrical power in a thermal power plant? (A) Generator (B) Turbine (C) Boiler (D) Condenser 15. Which cooling system is used in thermal power plants near rivers or lakes? (A) Once-through cooling (B) Air-cooled condenser (C) Dry cooling system (D) Cooling tower 16. Boiler efficiency refers to: (A) Heat to mechanical energy conversion (B) Steam produced vs water input (C) Ratio of fuel energy input to electrical output (D) Combustion chamber heat transfer 17. Greenhouse gas emissions from thermal power plants mainly contribute to: (A) Global warming (B) Acid rain (C) Ozone depletion (D) Soil erosion 18. Which pollutant is a major concern in oil-fired thermal power plants? (A) CO₂ (B) NOₓ (C) SO₂ (D) Lead 19. Which energy source is not directly applicable to thermal power generation? (A) Biomass (B) Geothermal (C) Wind (D) Hydrogen 20. A superheater is a device that: (A) Raises steam temperature above saturation (B) Lowers steam temperature (C) Removes steam impurities (D) Increases steam pressure 21. Which coal type has the highest carbon content? (A) Lignite (B) Bituminous (C) Sub-bituminous (D) Anthracite 22. The main advantage of a combined cycle power plant is: (A) Lower initial cost (B) Higher fuel efficiency (C) Simpler operation (D) Reduced environmental impact 23. Which gas is used as coolant in advanced gas-cooled reactors? (A) Carbon dioxide (B) Nitrogen (C) Helium (D) Hydrogen 24. Which factor is NOT considered in site selection of a thermal power plant? (A) Fuel availability (B) Cooling water (C) Wind energy availability (D) Distance from population 25. Which renewable energy source is commonly used in thermal power plants? (A) Biomass (B) Petroleum (C) Natural Gas (D) Propane